"Robert Morein" wrote in message
...
MOSFET amps are the most durable of all solid state amplifiers.
They can
drive any load without output damage, and if you're reasonably
lucky, they
will survive a dead short. The MOSFET transistor is now
ubiquitous in power
switching applications because of it's ruggedness.

Really? That's an exceptional claim. Why do you claim MOSFETs
amps are any more durable than a bipolar output stage amp?

Bipoloar transistors do exihibit secondary breakdown and current
hogging/thermal runaway. However, in a competent design both
issues can be firmly addressed. Reliability and durability
should be no worse than a MOSFET amp.

The reason MOSFET output stages are ubiquitous these days is cost
and availability.